Zero percent humidity

[Delwin D Fandrich]

----- Original Message ----- 
From: "Don" <pianotuna@accesscomm.ca>
To: "Pianotech" <pianotech@ptg.org>
Sent: January 08, 2004 7:27 PM
Subject: Re: Zero percent humidity


> Hi Terry,
>
> I was using an aspirated psychrometer, a barometer and a formula I had
> gotten from Environment Canada (our weather office) at that time which
was
> as "state of the art" as I could afford.
>
> There is more to the story as well. The piano was a Steinway B and had a
DC
> system (pre bottom cover) that had been unplugged. I returned it to
> service, came back 17 hours later and the pitch at A4 had gone up 13
cents.
> I had no choice but to tune it at that point in time because the
instrument
> was to be used in a performance.
>
> To see the exact unit go to this url and scroll down the page.
>
> http://www.apsnyc.com/html/humidity.html
>

I had no idea these things were still available. We also still use device
quite similar to this, though much older. It had been tossed out and I
rescued it, cleaned out a whole bunch of corroded battery insides that got
all outside and replaced the battery holder. Slower than digital but it
works great and I love it.

Del